Brown Trout stocking summary (LOMU)
Colin Lake - MNRF
Glenora Fisheries Station
Lake Ontario Management Unit
Date last updated: 2021-12-06
Data source
These data are from MNRF’s Fish Stocking Information System (FSIS: 2001- 2021). This summary is for LOMU Brown Trout stocking events only. If you see anything that looks like an error, please let me know.
Lifestage
This table shows the age (min and max) of the various Brown Trout life stages, and the time of year (month) that they were stocked. n = number of stocking events of the particular life stage.
| LIFESTAGE | n | min_age | max_age | min_month | max_month |
|---|---|---|---|---|---|
| Spring Fingerling | 11 | 4 | 6 | 4 | 6 |
| Fall Fingerling | 29 | 10 | 12 | 10 | 11 |
| Spring Yearling | 280 | 14 | 19 | 2 | 6 |
| Adult | 3 | 77 | 77 | 5 | 5 |
Number Stocked
Bar Plot
Table
MNRF-stocked fish are almost exclusively Spring Yearlings. Other life stages are generally stocked by community hatcheries.
| YEAR | Spring Fingerling | Fall Fingerling | Spring Yearling | Total |
|---|---|---|---|---|
| 2001 | 1,400 | – | 172,341 | 173,741 |
| 2002 | – | – | 162,746 | 162,746 |
| 2003 | – | – | 181,276 | 181,276 |
| 2004 | – | – | 171,821 | 171,821 |
| 2005 | – | 65,508 | 173,799 | 239,307 |
| 2006 | – | – | 91,811 | 91,811 |
| 2007 | – | 81,079 | 170,211 | 251,290 |
| 2008 | – | – | 177,133 | 177,133 |
| 2009 | – | – | 178,510 | 178,510 |
| 2010 | – | – | 190,040 | 190,040 |
| 2011 | – | – | 163,314 | 163,314 |
| 2012 | – | 33,342 | 177,710 | 211,052 |
| 2013 | – | 25,287 | 166,308 | 191,595 |
| 2014 | – | 45,000 | 162,098 | 207,098 |
| 2015 | 20,000 | 30,861 | 177,169 | 228,030 |
| 2016 | 20,000 | 35,000 | 163,727 | 218,727 |
| 2017 | 35,000 | 18,600 | 173,741 | 227,341 |
| 2018 | 35,000 | 30,000 | 178,549 | 243,549 |
| 2019 | 35,000 | 30,000 | 178,721 | 243,721 |
| 2020 | 35,000 | 19,000 | 156,320 | 210,320 |
| 2021 | 35,000 | – | 160,600 | 195,600 |
| Total | 216,400 | 413,677 | 3,527,945 | 4,158,022 |
Number by Stocking Zone
Total number of Brown Trout stocked by stocking zone (most recent five years; 2001 - current). The map at the bottom of this page shows the location of the various stocking zones.
Recent five years
2001 - current
Mean Weight by Lifestage
MNRF-produced fish only; click on the legend to isolate life stages.
Biomass
Bar plot
Table
Note: biomass is given in kg.
| YEAR | Fall Fingerling | Spring Fingerling | Spring Yearling | Total |
|---|---|---|---|---|
| 2001 | – | 2.8 | 9,689.9 | 9,693 |
| 2002 | – | – | 9,956.8 | 9,957 |
| 2003 | – | – | 8,716.8 | 8,717 |
| 2004 | – | – | 7,414.6 | 7,415 |
| 2005 | 1,242.9 | – | 6,794.6 | 8,038 |
| 2006 | – | – | 4,153.5 | 4,154 |
| 2007 | 1,754.2 | – | 8,189.2 | 9,943 |
| 2008 | – | – | 7,055.0 | 7,055 |
| 2009 | – | – | 5,421.6 | 5,422 |
| 2010 | – | – | 4,790.0 | 4,790 |
| 2011 | – | – | 3,409.8 | 3,410 |
| 2012 | 834.6 | – | 5,833.0 | 6,668 |
| 2013 | 601.6 | – | 4,851.5 | 5,453 |
| 2014 | 1,155.0 | – | 3,940.2 | 5,095 |
| 2015 | 462.9 | 40.0 | 6,526.0 | 7,029 |
| 2016 | 525.0 | 40.0 | 7,467.4 | 8,032 |
| 2017 | 380.8 | 70.0 | 7,985.0 | 8,436 |
| 2018 | 600.0 | 70.0 | 7,756.3 | 8,426 |
| 2019 | 750.0 | 175.0 | 8,218.8 | 9,144 |
| 2020 | 475.0 | 70.0 | 6,830.1 | 7,375 |
| 2021 | – | 70.0 | 6,734.8 | 6,805 |
| Total | 8,782.0 | 537.8 | 141,734.9 | 151,055 |
Stocking Dates
Average dates of Brown Trout stocking events (spring yearlings only) 
Stocking Temperatures
Average stocking site temperatures by year. Overall average (all years) indicated by horizontal dashed line and red text annotation.
Map
Stocking events aggregated by stocking site (spring yearlings only). Radius of circle indicates biomass (kg) stocked